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metachert

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Journal Article
Journal: Geology
Published: 13 May 2019
Geology (2019) 47 (7): 655–658.
...-bearing metachert from a classic subduction mélange, in order to better understand the timing and metamorphic conditions of subduction fluid metasomatism, and to gain a more complete picture of how fluids mitigate the influence of high-δ 18 O subduction inputs. Although much less abundant than...
FIGURES
Journal Article
Journal: Lithosphere
Published: 18 October 2018
Lithosphere (2018) 10 (6): 723–742.
... characteristics, we interpret the amphibolite and quartzite as metabasalt and metachert, respectively. The top of the Orocopia Schist is only ∼3–4 km below a ca. 21 Ma tuff in the footwall of the Plomosa detachment fault, suggesting that a major Paleogene exhumation event brought the schist to upper-crustal...
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Journal Article
Published: 01 February 2017
Mineralogical Magazine (2017) 81 (1): 167–173.
...G. O. Lepore; L. Bindi; F. Di Benedetto; E. Mugnaioli; C. Viti; A. Zanetti; M. E. Ciriotti; P. Bonazzi Abstract In the manganesiferous ores associated with the metacherts of the ophiolitic sequences at the Cerchiara mine, Eastern Liguria (Italy), a new Mn-bearing mineral belonging to the mica group...
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Journal Article
Journal: Lithosphere
Published: 01 August 2016
Lithosphere (2016) 8 (4): 386–395.
... ( Ludwig, 2003 ). The high P - T schists in the Kurosegawa zone are mostly metabasites and metacherts. Previous studies (e.g., Maruyama et al., 1978 ; Maruyama 1981a , 1981b ) reported high- P minerals such as jadeite, glaucophane, lawsonite, and chloromelanite from these rocks...
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Journal Article
Journal: Geosphere
Published: 01 August 2015
Geosphere (2015) 11 (4): 1077–1110.
..., blueschist-facies metasandstones and associated metachert and basic metavolcanic rocks. The dominant metasandstones are now known to be predominantly of Early to Middle Cretaceous depositional age; whereas some cherts are of Jurassic to Early Cretaceous age ( Isozaki and Blake, 1994 ; Dumitru et al., 2015...
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Journal Article
Published: 01 April 2013
American Mineralogist (2013) 98 (4): 680–688.
... with a model for the kinetics of diffusion-controlled grain growth. The metachert samples were collected from the contact aureole of the Hanase-Bessho quartz diorite at Hanase Pass, Kyoto, Japan. The quartz grain sizes vary systematically with distance from the quartz diorite. We calculated the temperature...
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Journal Article
Published: 01 February 2011
The Canadian Mineralogist (2011) 49 (1): 195–206.
...Peter Bačík; Štefan Méres; Pavel Uher Abstract Vanadium-bearing tourmaline was found in Paleozoic metacherts near Chvojnica in the Strážovské vrchy Mountains, Slovakia. The geochemistry of metacherts suggests that the protolith was deposited under anoxic conditions. Tourmaline from Chvojnica...
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Journal Article
Published: 01 October 2006
Mineralogical Magazine (2006) 70 (5): 545–564.
...C. Grevel; W. V. Maresch; K.-P. Stanek; F. Grafe; S. Hoernes Abstract Deerite, a typical mineral of Fe-rich metacherts metamorphosed under blueschist conditions, is not rare, but known occurrences have up to now been restricted mainly to the Tethyan collisional zone and the Western Cordillera...
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Journal Article
Published: 01 September 2006
European Journal of Mineralogy (2006) 18 (5): 569–582.
...Bénédicte CENKI-TOK; Alain RAGU; Thomas ARMBRUSTER; Christian CHOPIN; Olaf MEDENBACH Abstract Two new rare-earth-bearing members of the epidote group are described from carbonate pods in Mn-rich metacherts. According to the structure refinements, Mn occurs mainly in the divalent state in both...
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Journal Article
Published: 01 September 2006
Geological Magazine (2006) 143 (5): 737–741.
...PETER W. U. APPEL; NIELS ABRAHAMSEN; THORKILD M. RASMUSSEN Abstract Two lightning impacts are described from an area near the Inland Ice in West Greenland. The first lightning blasted an outcrop of metacherts. It subsequently split into two branches, which traversed rock outcrops and boulders...
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Journal Article
Journal: GSA Bulletin
Published: 01 May 2003
GSA Bulletin (2003) 115 (5): 566–580.
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Journal Article
Journal: GSA Bulletin
Published: 01 June 2002
GSA Bulletin (2002) 114 (6): 643–655.
... and southeast ( Shaw, 1970 ; Carrington, 1973 ; Tull and Telle, 1989 ; Lim, 1998 ; Tull, 1998 ). The olistostromes contain sand- to boulder-sized fragments of (1) carbonate rock, (2) metachert, and (3) metasandstone and metasiltstone, all typical of the underlying Sylacauga Marble and Kahatchee Mountain...
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Journal Article
Published: 01 June 2001
The Canadian Mineralogist (2001) 39 (3): 717–727.
...Roberto Cabella; Gabriella Lucchetti; Pietro Marescotti Abstract Monazite-(Ce) and xenotime-(Y) were found in the metacherts (pumpellyite–actinolite-facies conditions: 3 ≤ P ≤ 4 kbars and 300 ≤ T ≤ 350°C) of the Monte Figogna Unit, Sestri–Voltaggio Zone, Liguria, in Italy, as scattered...
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Journal Article
Journal: Geology
Published: 01 January 1996
Geology (1996) 24 (1): 75–78.
Journal Article
Published: 01 August 1993
American Mineralogist (1993) 78 (7-8): 804–818.
... several hundred meters from the contact. Broad wollastonite rims occur around the metachert layers into the tremolite zone. Isobaric ( P ≈ 1000 bars) univariant and invariant parageneses indicate that the fluid phase in the marbles was internally buffered and that the marbles were not subject...
Journal Article
Published: 01 January 1991
European Journal of Mineralogy (1991) 3 (1): 63–68.
Journal Article
Published: 01 August 1990
Journal of the Geological Society (1990) 147 (4): 639–652.
.... The amphibolites are associated with pillow-structured and pyroclastic, komatiitic ultramafic schists, dunitic-harzburgitic sills, a stratiform gabbro, pyritous metacherts and quartzo-feldspathic gneisses and schists with field and chemical characteristics suggesting they formed as acid-intermediate tuffaceous...
Journal Article
Journal: Geology
Published: 01 March 1989
Geology (1989) 17 (3): 269–272.
Journal Article
Published: 01 September 1986
The Canadian Mineralogist (1986) 24 (3): 475–477.